package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.ExceptionAll.MyCustomException;
import com.itheima.commit.MyThreadLocal;
import com.itheima.commit.R;
import com.itheima.mapper.OrdersMapper;
import com.itheima.pojo.*;
import com.itheima.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;

    @Override
    public R<String> add(Orders orders) {
        Long threadLocal = MyThreadLocal.getThreadLocal();
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,threadLocal);

        List<ShoppingCart> list = shoppingCartService.list(wrapper);

        if (list == null) {
            throw new MyCustomException("您还没选择商品，不能下单");
        }

        User byId = userService.getById(threadLocal);

        Long addressBookId = orders.getAddressBookId();
        AddressBook byId1 = addressBookService.getById(addressBookId);

        if (byId1 == null) {
            throw new MyCustomException("地址有误，请核实");
        }

        long id = IdWorker.getId();
        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = list.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(id);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setId(id);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(threadLocal);
        orders.setNumber(String.valueOf(id));
        orders.setUserName(byId.getName());
        orders.setConsignee(byId1.getConsignee());
        orders.setPhone(byId1.getPhone());
        orders.setAddress((byId1.getProvinceName() == null ? "" : byId1.getProvinceName())
                + (byId1.getCityName() == null ? "" : byId1.getCityName())
                + (byId1.getDistrictName() == null ? "" : byId1.getDistrictName())
                + (byId1.getDetail() == null ? "" : byId1.getDetail()));

        this.save(orders);

        orderDetailService.saveBatch(orderDetails);

        shoppingCartService.remove(wrapper);
        return R.success("下单成功");
    }
}
